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  2. Zinc–air battery - Wikipedia

    en.wikipedia.org/wiki/Zinc–air_battery

    Zinc–air hearing aid batteries PR70 from both sides. Left side: Anode and gasket. Right side: Cathode and inlet opening for the atmospheric oxygen. A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air.

  3. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    Zinc-air hearing aid batteries. Miniature zinc-air batteries are button cells that use oxygen in air as a reactant and have very high capacity for their size. Each cell needs around 1 cm 3 of air per minute at a 10 mA discharge rate. These cells are commonly used in hearing aids.

  4. Hearing aid - Wikipedia

    en.wikipedia.org/wiki/Hearing_aid

    They are typically loaded into the hearing aid via a rotating battery door, with the flat side (case) as the positive terminal and the rounded side as the negative terminal . These batteries all operate from 1.35 to 1.45 volts. The type of battery a specific hearing aid utilizes depends on the physical size allowable and the desired lifetime of ...

  5. The 9 best rechargeable hearing aids, according to hearing ...

    www.aol.com/lifestyle/best-rechargeable-hearing...

    What truly sets apart Starkey Genesis AI hearing aids from the pack — aside from the whopping 51-hour battery — is the highly intelligent technology that includes its neuroprocessor, which ...

  6. Treo 755p - Wikipedia

    en.wikipedia.org/wiki/Treo_755p

    Hearing aid compatibility: ... Intel XScale 312 MHz; Screen: 320 by 320 Color 2x2 in. TFT, 65,536 Colors ... 1600 mAh rechargeable lithium-ion battery;

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